Elevator-clutch.



S. SANNA.

ELEVATOR CLUTCH. APPLIOATION 1:11.21) mm: 24,1911.

Patented July 2, 1912.

2 8HBETBBEEET 1.

S. SANNA.

ELEVATOR CLUTCH.

APPLICATION FILED M11224.

Patented July 2, i912.

2 SHEETS 2. H z W SALVATORE sauna, or OLINGHOUSE, NEVADA,

ELEVATOR-CLUTCH.

Specification of Letters Patent.

;.-App1ication filed June 24, 1911. Serial No. 635,150.

Patented July 2, 1912 1 '0 all whom it may concern die it known that l, Sanva'ronn SANNA, citizen of the United States, residing at ()linghouse, in the county of Washoe and State of Nevada, have invented new and useful Improvements in Elevator-Clutchos,

of which the following is a specification.

The object of the invention is to simplify .and reduce the cost of manufacturing ele-.

vator clutches without detracting from their ctliciency or durability.

.Other objects will appea and be better I understood from the following description taken in conncctlon with the accompanying drawings in which:

Figure 1 is a side elevation of a cage provided with my device; Fig. 2 is a detail front elevation of the upper end of the cage shown in Fig. '1 with parts thereof broken away; Fig. 8 is a sectional plan view on thelme 3-3 of Fig. 2.

In the embodiment shown the cage 5 has the usual slides 6 which bear on the oppo- -.site sides of the guides 7. Rock sha-l'ts 8 cxtend transversely of the cage hearings in the opposite sides of the same 0 am] have and at the upper and lower portions of said sides as shown in the drawing and are 'arranged on either side of the guides 7. Dogs or clutch members 9 are suitably secured such as by keys 10 to the opposite ends of the rock shafts '8. The adjacent faces of the dogs are provided with teeth 11 which engage with the guides 7 when the dogs are moved in one direction in a. manner to be presently described. The links 12 connect the dogs located to one side of the guides 7 and similar links 1'3 connect the dogs located adjacent to the opposite sides of the guides. A bearingpla'tc l-l-is supported by archeslf) connected to the-plate 1a in any suitable manner such as by rivets 16 and further connected to the upper end of the Ycage in any suitable manner such as by rivets 17. 'lheplate isadditionally s'upported by means of struts 18 connected Lthereto and to the upper end of the cage in 'any' suitable manner such as by r: vets It).

The 'snp 'iortmg mechanism 'lor the cage;

exclusively of the ordinary cable, is herein shown to comprlse a horizontally disposed platform 20 located below the hearing 14- the platform are held to-the upper ends of I the slots by means of the ordinary bolt 24 which passes through the bearing plate lat andthrough the central portion of the platform 20. and having at its lower end a head 25 which bears on the lower face of the platform 20. The upper end of the bolt 24 has an eye 20 to receive the supporting cable as shown. A helical thrust spring 27 surrounds the bolt and bears on the platform 20 and bearing plate 14. 'hen the platform is in the posit-ital; shown in Fig. 1 the spring 25 will be pressed so that in the event o'f the cable or its operating mechanism, breaking the spring will expand and move the platform downwardly. The downward movement of the platform will turn the rock shafts S and the toothed faces of the do s or clutch members into en a ement H b D 1 with the guides 7 whereby the car will be slllllflll'l ed by the dogs and guides and pre-.'

vcntedtrom falling to the bottom ofthe shaft. A casing 23.. which corresponds to the length of the spring when the same is tensioncd. surrounds the s )lllW' and is so shown and described, since various changes may be made within the scope of the claim without departing. from the spirit of the invention.

What is claimed as'new isz' lna safety device for elevators, the combination with a cage; of a bodily 'inov'able platform disposed above the top of the cage, shal'ls provided with clutch devices and journalcd in the upper and lower portions of the cage, links connecting the said shafts,

pin and slot connections between the four than the normal lengl-h of the spring and corners of the platform and the said upper surrounding the same. 10 shafts, a spring for actuating theplatfornl In testimony whereof I uilix my signato move downwardly and operate the clutch lure in presence of two Witnesses.

5 devices and means associated with the plat- SALVATORE SANNA.

form and 'coiiperating with the cage to limit 7 \Vi-tnesses: v v the tensioning. of said spring and including B. G. Lnnsms,

a hollow cylindrical casing of less length J. AARON INGALLS. 

